Yes, but it's not as well known as the Holocaust...especially as the Turkish government has a position of denial about it...
Further, mass media was in its infancy, radio did not exist, etcetera. The holocaust happened somewhere that was totally conquered so the world's press can come and take pictures of it.
If there were more videos and pictures of the Gulag and Holomodor, it is possible Stalin's name would be up there with Hitler's.* I mean, to us history freaks it is, but think of the average person. I work in a body shop, so if you ask them who Hitler was they're like, "He's a nazi he killed the Jews." Ask them about Stalin and you get a shrug.
You can't underestimate mass media.
*Just so I don't sound like a nazi apologist, if we had mass media coverage of the Nazi genocide of Belarussians. I researched it in college, something like
2 million dead out of eight million. That's 25% of everybody. If we take into account Nazi and USSR deportations, only
50% of Belorussians were able to stay alive in their own country.
Why do we never hear about it? No pictures, no videos, and no western media (or Second World media for that matter) that really wanted to cover the issue.